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Replace Coil Assembly. Gas turned OFF. Turn Manual Gas Valve ON. Line fuse or heater circuit fuse blown to unit. Replace fuse. Defective Door Switch. Replace Door Switch. Silicon Carbide Igniter not igniting gas. Must be 3/16” to 5/16” above burner. Replace Radiant Sensor. Air Switch not operating. Clean out lint compartment daily. Check Back Draft Damper for foreign objects, lint accumulation or other causes that may prevent damper from operating. Check duct work for lint build-up. Check installation sheet to insure that duct work and make-up air openings are adequately sized. Check exhaust outlet. If a screen has been improperly installed on the outlet, it may be clogged with lint or frozen over in winter. Never install a screen on the exhaust outlet. Vacuum within dryer drops to .09 inches or water column, or less, for normal operation of dryer, vacuum reading can be made with a Vacuum U-Gauge by removing a sheet metal screw in the front panel of dryer, and inserting the rubber tube of the vacuum gauge into screw opening. Page 36 Troubleshooting Chart—Gas, Steam, and Electric Dryers TROUBLE CAUSE REMEDY Dryer runs, but no heat. (continued) Air Switch out of adjustment. See Air Switch Adjustment Sheet in Service Manual. Air Switch defective. Replace Air Switch. Gas pressure too low. Check manifold pressure and adjust to pressure specified on Rating Plate. If this pressure cannot be obtained, have gas supplier check main pressure. Improper orifice. Dryer is orificed for type of gas specified on Rating Plate. Check with gas supplier to determine specifications for gas being used. If different from Rating Plate, Contact factory and obtain proper orifices. Electric power to heating unit turned OFF. Turn power ON. Defective relay. Replace relay. Defective thermostat. Replace thermostat. Defective Safety Replace thermostat. Overload Thermostat. Lint compartment door OPEN. CLOSE door. Main Burners burning improperly. Burner Air Shutters CLOSED. OPEN for blue flame. Dirt in burner. Blow out. High gas pressure. Adjust gas pressure per Rating Plate. Orifice too large. Send to factory for correct orifices. Restricted or blocked exhaust. Clean exhaust. Main Burner cycles ON and OFF. Radiant Sensor defective. Replace Radiant Sensor. Low or high gas flame. Incorrect Main Burner orifices. Replace orifices. Check factory for correct size. Page 37 Troubleshooting Chart—Gas, Steam, and Electric Dryers TROUBLE CAUSE REMEDY Dryer too hot. Incorrect Main Burner orifice. Replace orifices. Check factory for correct size. Inadequate make-up air. Make-up air must be 4 to 6 times the exhaust area of the dryer. Lint accumulated. Remove lint. Exhaust duct dampers. Must be full OPEN or replace. High gas pressure. Adjust gas pressure as specified on Rating Plate. Partially restricted or inadequately sized exhaust system. Check Service section for recommended sizes. Remove obstructions or lint build up from duct work. NEVER use smaller size exhaust duct. ALWAYS use larger size. Defective thermostat. Replace thermostat. Dryer does not stop at end of time period (6). Defective timer. Replace timer. Dryer runs no steam to coils. Valve CLOSED. Check all valves in steam supply and return. Make sure they are OPEN. Steam Trap blocked. Remove and clean. Replace if defective. Solenoid Valve. On dryers using solenoid temperature control, thermostat controls operation of Solenoid Valve by advancing thermostat. Thermostat. On dryers using solenoid temperature control, thermostat controls operation of Solenoid Valve. If defective, replace thermostat. Check Valve installed incorrectly. Check for inlet and outlet marking on Check Valve and invert if necessary. Strainer clogged. Remove plug and blow down Strainer or remove and clean thoroughly if heavily clogged. Water in Steam Line. Steam Piping installed incorrectly. Check piping per Steam Installation Instructions. Trap not functioning. Check trap for size and capacity. If dirty and sluggish, clean t...

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